Simply Scala

Simply Scala is browser-based implementation of Scala language. It was written in 2009 by A.J.Bagwell as an easy way to try Scala without having to install it. Server-side part of it is written in Scala, and client UI uses JavaScript.

Simply Scala works as an interactive interpreter: you enter the code in the input box, press “Evaluate” and watch the results of evaluation (output or messages about defined classes, modules etc.).